Method and system for creating irregular three-dimensional polygonal volume models in a three-dimensional geographic information system

A method for constructing a wire-frame three-dimensional polygonal model of a three-dimensional irregular volume within a GIS platform comprising of:

• (a) introducing desired data including control points and attributes relating to said three-dimensional irregular volume into said GIS platform;
• (b) estimating at least one two-dimensional polygon representing a lateral boundary of said three-dimensional irregular volume based upon values of variable of interest at said control points;
• (c) estimating irregular surfaces representing top and bottom of said three-dimensional irregular volume by interpolating grids of depth values from said control points for said top and bottom surfaces of said three-dimensional irregular volume;
• (d) clipping said estimated irregular surfaces with said estimated at least one two-dimensional polygon;
• (e) constructing a grid of regularly spaced polylineZs representing top surface, bottom surface, and sides of said three-dimensional irregular volume to produce said wire frame three-dimensional irregular volume model within said GIS platform;
• and
• (f) joining said attributes to said wire-frame three-dimensional irregular volume model within said GIS platform.

A method for constructing at least one three-dimensional polygonal model of an oil and gas reservoir within a GIS platform comprising of:

• (a) collecting data on at least one oil and gas reservoir and attributes that will be used to create said three-dimensional irregular polygonal model of said at least one reservoir within a GIS platform;
• (b) loading desired software on to a computer system;
• (c) organizing said data into a database and said GIS platform;
• (d) estimating at least one two-dimensional polygon representing a lateral boundary of said at least one reservoir;
• (e) identifying an oil and gas field with said at least one reservoir for creating said three-dimensional irregular polygonal model of said at least one reservoir within said GIS platform;
• (f) estimating irregular surfaces representing top and bottom of said at least one reservoir based on said control points provided by said wells that intersect said at least one reservoir;
• (g) clipping said estimated irregular surfaces with said estimated at least one two-dimensional polygon;
• (h) constructing multipatches to represent top surface, bottom surface and sides of said at least one reservoir to produce said solid volume three-dimensional irregular polygonal model of said at least one reservoir within said GIS platform;
• and
• (i) joining said attributes data on said at least one reservoir to said multipatch of said solid volume three-dimensional irregular polygonal model of said at least one reservoir within said GIS platform.